Deadhead vs ringing

Deadhead

noun
  • A fan of the rock band The Grateful Dead. 

ringing

noun
  • The sound of something that rings. 

  • The quality of being resonant. 

  • A technique used in the study of wild birds, by attaching a small, individually numbered, metal or plastic tag to their legs or wings. 

  • The theft of cars and illegally changing their identities for resale. 

adj
  • Loud and clear. 

  • Made forcefully; powerful. 

How often have the words Deadhead and ringing occurred in a corpus of books? (source: Google Ngram Viewer )